Key Facts

  • Categorized as a Jupiter Trojan
  • Comparable in size to the city of Dallas (31.12 km diameter)
  • Not a Near Earth Object
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

18063 (1999 XW211) is a large asteroid that shares Jupiter's orbit around the sun. NASA JPL has not classified 1999 XW211 as potentially hazardous because its orbit does not bring it close to Earth.

1999 XW211 orbits the sun every 4,280 days (11.72 years), coming as close as 4.86 AU and reaching as far as 5.46 AU from the sun. 1999 XW211 is about 31.1 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the city of Dallas.

No Close Approaches

1999 XW211's orbit is 3.91 AU from Earth's orbit at its closest point. This means that there is an extremely wide berth between this asteroid and Earth at all times.

Orbital simulations conducted by NASA JPL's CNEOS do not show any close approaches to Earth.

Images and Observations

1999 XW211's orbit is determined by observations dating back to Oct. 11, 1974. It was last officially observed on April 22, 2023. The IAU Minor Planet Center records 1,963 observations used to determine its orbit.

Accessibility and Exploration

This asteroid is not considered a viable target for human exploration by the NHATS study.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 1999 XW211:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 5.162 AU
  • Eccentricity: 0.0582
  • Inclination: 17.98°
  • Longitude of Ascending Node: 327.03°
  • Argument of Periapsis: 66.1°
  • Mean Anomaly: 74.32°

Physical Characteristics

  • Diameter: 31.12200 km
  • Magnitude: 11.32
  • Albedo: 0.073

Derived Characteristics

  • Orbit Period: 4,280 days (11.72 years)
  • Avg. Orbit Speed: 13.12 km/s
  • Aphelion Distance: 5.46 AU
  • Perihelion Distance: 4.86 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of 18063 (1999 XW211) is indicated by a ◯ pink circle. Note that the object may not be in your current field of view. Use the controls below to adjust position, location, and time.